MCQ
Pressure exerted by a gas is:
- ADirectly proportional to the density of the gas.
- BDirectly proportional to the square of the density of the gas.
- CInversely proportional to the density of the gas.
- DIndependent of density of the gas.
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$I.$ Waves created on the surfaces of a water pond by a vibrating sources.
$II.$ Wave created by an oscillating electric field in air.
$III.$ Sound waves travelling under water.
Which of these can be polarized
